Hello,
This is default WooCommerce plugin registration form and theme doesn’t have any options for this. Look for plugins that would help you with this, for example, https://wordpress.org/plugins/fma-additional-registration-attributes/ or you may try to follow some tutorials, for example, https://www.cloudways.com/blog/add-woocommerce-registration-form-fields/ Or contact WC plugin support.
Regards
